-44.46% is the change from 920 to 511
Calculation steps:
[( 511 - 920 ) ÷ 920] x 100 = -44.46%
Formula
Percentage change = [(511 - 920) / 920] x 100
Subtract the new number by the original number
511 - 920 = -409
-409 ÷ 920 = -0.44456521739130433
-0.44456521739130433 x 100 = -44.46%